Operation Manual

Configuring ISDN Interfaces 101
will be maintained in case of an Inactivity Timeout (physical
connection down), and any incoming call to the interface will be
rejected during this period. This guarantees that an ISDN data
channel will be physically available whenever data is to be
transmitted from or to the remote client, and is the recom-
mended type of remote node usage.
"On Demand Interface Acquirement" means that an interface and
the underlying ISDN data channel will not be reserved for one
connection, but will be released and become available for any
other dial-in or dial-out operation as soon as the underlying
physical ISDN data channel between the remote client and the
interface is deactivated due to an Inactivity Timeout. This type is
more flexible, since it allows more than one remote clients to
share a single ISDN data channel. It cannot be guaranteed,
however, that an ISDN data channel is available whenever data
is to be transferred from or to the remote client, since the physi-
cal ISDN data channel might be in use for another remote client
communicating with the LAN.
4. Check the Call Acceptance .
This parameter specifies whether a specific security mechanism
is to be placed ahead of the local network security mechanisms
(specific NetWare login scripts or TCP/IP based logins for each
remote user, for example) when a call is set up from a remote site
to this interface of the ISDN-Controller for the first time.
Default: All Numbers
Options: All Numbers, Only Registered Numbers: Caller-
Specified, Only Registered Numbers: CLI, Only
Registered Numbers: CLI and Caller-Specified
If "All Numbers" is selected, no ISDN-specific security check is
performed and all incoming calls for the MSN, EAZ or DDI
configured for this ISDN interface are accepted.
"Only Registered Numbers" means that all incoming calls for the
MSN, EAZ or DDI configured for this ISDN interface are cross-
checked by their transmitted number (or numbers), and access is
denied to all incoming calls not registered in the Call Acceptance
Database. The following options are possible:
- Caller-Specified: the origination address (made up from the
components International Dialing Prefix, Country Code, Area